Terrific capture Desmond. I love the intense, fantastic, and killer stare of the goshawk. The soft light and white BG works really fine for me and the texture and position of the tail is to die for. You did a very good job getting shrap this guy when he was approaching to you. Some noise in the wing tips and I would try to rework the image applying a less sharpening. I can´t wait to see more of thi sseries so keep on posting. :-)
Quite the intense stare on this guy. In addition to Juan's comments I will mention that there is some blue being cast on your subject (most likely being reflected from the snow). A favorite technique of mine when I see a cast on a bird that does not naturally have that colour on it is to pull the saturation down completely...but on that colour channel only. In this case blue and cyan channels only (you can QM the bird if you don't want to affect the surroundings).